Wireless Power Repeater Using Mutual-Inductance Frequency Scanning
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Solution Overview
Problem
Existing wireless power transmission technologies waste energy and pose health risks due to constant power transmission regardless of the receiver's location, leading to inefficient energy transfer and potential harm from magnetic fields.
Innovation Solution
A wireless power transmitter and repeater system using resonance with a repeating resonator unit that adjusts its frequency based on the mutual inductance component with the receiver, allowing efficient energy transfer only to the specific location of the wireless power receiver, reducing waste and magnetic field exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If constant power transmission is performed regardless of receiver location, then power transmission coverage is maintained, but energy waste increases and harmful magnetic fields are generated
Solution Approach 1:
The system performs periodic scanning of multiple frequency channels to detect the presence and location of wireless power receivers. Instead of continuous constant-frequency transmission, the transmitter periodically switches between different frequency channels (e.g., 6 channels scanned every 100ms), transmitting power only when a receiver is detected on a specific channel, thereby reducing energy waste and harmful magnetic field exposure.
Solution Approach 2:
The system dynamically adjusts transmission parameters including frequency selection, transmission power level, and active transmission timing based on real-time receiver detection results. The transmitter transitions from static constant transmission to dynamic adaptive transmission, activating transmission only on channels where receivers are present and adjusting power levels according to receiver position and requirements.
2Productivity
If multiple frequency channels are scanned periodically, then energy transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The frequency spectrum is segmented into multiple discrete channels (e.g., 6 frequency channels), allowing the system to scan and identify the optimal channel for power transmission. This segmentation enables efficient frequency-division multiplexing and simplifies the detection process by dividing the broad frequency search into manageable discrete channels.
Solution Approach 2:
The system changes transmission frequency parameters periodically across multiple channels to detect receiver presence and optimize power transfer. By varying the frequency parameter and monitoring impedance changes or power consumption patterns, the system identifies active receivers and adjusts transmission parameters accordingly, improving efficiency without requiring complex communication protocols.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves energy transmission efficiency to the wireless power receiver, reduces power waste, and minimizes harmful magnetic field exposure, while implementing a simple and cost-effective active transmission scheme.
Implementation Method 1
a wireless power transmitter which wirelessly transmits power to a wireless power receiver using resonance
Implementation Method 2
AC power having a mutual-change resonant frequency, which results from a mutual inductance component between the wireless power receiver and the repeating resonant unit
Data Source
AI summary
Disclosed is a wireless power transmitter which transmits power to a wireless power receiver using resonance. The wireless power transmitter includes a repeating resonant unit and a power source transmitting AC power having a mutual-change resonant frequency, which results from a mutual inductance component between the wireless power receiver and the repeating resonant unit, to the repeating resonant unit.